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Ørberg SB, Duarte CM, Geraldi NR, Sejr MK, Wegeberg S, Hansen JLS, Krause-Jensen D. Prevalent fingerprint of marine macroalgae in arctic surface sediments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 898:165507. [PMID: 37442464 DOI: 10.1016/j.scitotenv.2023.165507] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 06/22/2023] [Accepted: 07/11/2023] [Indexed: 07/15/2023]
Abstract
Macroalgal forests export much of their production, partly supporting food webs and carbon stocks beyond their habitat, but evidence of their contribution in sediment carbon stocks is poor. We test the hypothesis that macroalgae contribute to carbon stocks in arctic marine sediments. We used environmental DNA (eDNA) fingerprinting on a large-scale set of surface sediment samples from Greenland and Svalbard. We evaluated eDNA results by comparing with traditional survey and tracer methods. The eDNA-based survey identified macroalgae in 94 % of the sediment samples covering shallow nearshore areas to 1460 m depth and 350 km offshore, with highest sequence abundance nearshore and with dominance of brown macroalgae. Overall, the eDNA results reflected the potential source communities of macroalgae and eelgrass assessed by traditional surveys, with the most abundant orders being common among different methods. A stable isotope analysis showed a considerable contribution from macroalgae in sediments although with high uncertainty, highlighting eDNA as a great improvement and supplement for documenting macroalgae as a contributor to sediment carbon stocks. Conclusively, we provide evidence for a prevalent contribution of macroalgal forests in arctic surface sediments, nearshore as well as offshore, identifying brown algae as main contributors.
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Affiliation(s)
- Sarah B Ørberg
- Department of Ecoscience, Aarhus University, DK-8000 Aarhus C, Denmark; Arctic Research Centre, Aarhus University, DK-8000 Aarhus C, Denmark.
| | - Carlos M Duarte
- Arctic Research Centre, Aarhus University, DK-8000 Aarhus C, Denmark; King Abdullah University of Science and Technology, Red Sea Research Center and Computational Bioscience Research Center, Thuwal, Saudi Arabia.
| | - Nathan R Geraldi
- Department of Ecoscience, Aarhus University, DK-8000 Aarhus C, Denmark.
| | - Mikael K Sejr
- Department of Ecoscience, Aarhus University, DK-8000 Aarhus C, Denmark; Arctic Research Centre, Aarhus University, DK-8000 Aarhus C, Denmark.
| | - Susse Wegeberg
- Arctic Research Centre, Aarhus University, DK-8000 Aarhus C, Denmark; Department of Ecoscience, Aarhus University, DK-4000 Roskilde, Denmark.
| | - Jørgen L S Hansen
- Department of Ecoscience, Aarhus University, DK-4000 Roskilde, Denmark.
| | - Dorte Krause-Jensen
- Department of Ecoscience, Aarhus University, DK-8000 Aarhus C, Denmark; Arctic Research Centre, Aarhus University, DK-8000 Aarhus C, Denmark.
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Vieira C, Kim MS, N’Yeurt ADR, Payri C, D’Hondt S, De Clerck O, Zubia M. Marine Flora of French Polynesia: An Updated List Using DNA Barcoding and Traditional Approaches. BIOLOGY 2023; 12:1124. [PMID: 37627008 PMCID: PMC10452401 DOI: 10.3390/biology12081124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/01/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023]
Abstract
Located in the heart of the South Pacific Ocean, the French Polynesian islands represent a remarkable setting for biological colonization and diversification, because of their isolation. Our knowledge of this region's biodiversity is nevertheless still incomplete for many groups of organisms. In the late 1990s and 2000s, a series of publications provided the first checklists of French Polynesian marine algae, including the Chlorophyta, Rhodophyta, Ochrophyta, and Cyanobacteria, established mostly on traditional morphology-based taxonomy. We initiated a project to systematically DNA barcode the marine flora of French Polynesia. Based on a large collection of ~2452 specimens, made between 2014 and 2023, across the five French Polynesian archipelagos, we re-assessed the marine floral species diversity (Alismatales, Cyanobacteria, Rhodophyta, Ochrophyta, Chlorophyta) using DNA barcoding in concert with morphology-based classification. We provide here a major revision of French Polynesian marine flora, with an updated listing of 702 species including 119 Chlorophyta, 169 Cyanobacteria, 92 Ochrophyta, 320 Rhodophyta, and 2 seagrass species-nearly a two-fold increase from previous estimates. This study significantly improves our knowledge of French Polynesian marine diversity and provides a valuable DNA barcode reference library for identification purposes and future taxonomic and conservation studies. A significant part of the diversity uncovered from French Polynesia corresponds to unidentified lineages, which will require careful future taxonomic investigation.
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Affiliation(s)
- Christophe Vieira
- Department of Biology and Research Institute for Basic Sciences, Jeju National University, Jeju 63243, Republic of Korea;
- Phycology Research Group, Center for Molecular Phylogenetics and Evolution, Ghent University, 9000 Ghent, Belgium
| | - Myung Sook Kim
- Department of Biology and Research Institute for Basic Sciences, Jeju National University, Jeju 63243, Republic of Korea;
| | - Antoine De Ramon N’Yeurt
- Pacific Center for Environment an Sustainable Development, The University of the South Pacific, Private Mail Bag, Suva P.O. Box 1168, Fiji;
| | - Claude Payri
- Institut de Recherche pour le Développement, Nouméa 98848, New Caledonia
| | - Sofie D’Hondt
- Phycology Research Group, Center for Molecular Phylogenetics and Evolution, Ghent University, 9000 Ghent, Belgium
| | - Olivier De Clerck
- Phycology Research Group, Center for Molecular Phylogenetics and Evolution, Ghent University, 9000 Ghent, Belgium
| | - Mayalen Zubia
- UMR Ecosystèmes Insulaires Océaniens, University of French Polynesia, BP6570, Faa’a 98702, Tahiti, French Polynesia
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Saini KC, Gupta K, Sharma S, Gautam AK, Shamim S, Mittal D, Kundu P, Bast F. First report of Planomicrobium okeanokoites associated with Himantothallus grandifolius (Desmarestiales, Phaeophyta) from Southern Hemisphere. PLoS One 2023; 18:e0282516. [PMID: 37058520 PMCID: PMC10104341 DOI: 10.1371/journal.pone.0282516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 02/16/2023] [Indexed: 04/15/2023] Open
Abstract
Gram-positive, aerobic, motile, rod-shaped, mesophilic epiphytic bacterium Planomicrobium okeanokoites was isolated from the surface of endemic species Himantothallus grandifolius in Larsemann Hills, Eastern Antarctica. The diversity of epiphytic bacterial communities living on marine algae remains primarily unexplored; virtually no reports from Antarctic seaweeds. The present study used morpho-molecular approaches for the macroalgae and epiphytic bacterium characterization. Phylogenetic analysis was performed using mitochondrial genome encoded COX1 gene; chloroplast genome encodes rbcL; nuclear genome encoded large subunit ribosomal RNA gene (LSU rRNA) for Himantothallus grandifolius and ribosomal encoded 16S rRNA for Planomicrobium okeanokoites. Morphological and molecular data revealed that the isolate is identified as Himantothallus grandifolius, which belongs to Family Desmarestiaceae of Order Desmarestiales in Class Phaeophyceae showing 99.8% similarity to the sequences of Himantothallus grandifolius, from King George Island, Antarctica (HE866853). The isolated bacterial strain was identified on the basis of chemotaxonomic, morpho-phylogenetic, and biochemical assays. A phylogenetic study based on 16S rRNA gene sequences revealed that the epiphytic bacterial strain SLA-357 was closest related to the Planomicrobium okeanokoites showing 98.7% sequence similarity. The study revealed the first report of this species from the Southern Hemisphere to date. Also, there has been no report regarding the association between the Planomicrobium okeanokoites and Himantothallus grandifolius; however, there are some reports on this bacterium isolated from sediments, soils, and lakes from Northern Hemisphere. This study may open a gateway for further research to know about the mode of interactions and how they affect the physiology and metabolism of each other.
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Affiliation(s)
- Khem Chand Saini
- Department of Botany, Central University of Punjab, Ghudda, Bathinda, Punjab, India
| | - Kriti Gupta
- Department of Botany, DAV College, Bathinda, Punjab, India
| | - Sheetal Sharma
- Department of Botany, Central University of Punjab, Ghudda, Bathinda, Punjab, India
| | - Ajay K. Gautam
- Department of Botany, Central University of Punjab, Ghudda, Bathinda, Punjab, India
| | - Samrin Shamim
- Department of Botany, Central University of Punjab, Ghudda, Bathinda, Punjab, India
| | - Divya Mittal
- Department of Botany, Central University of Punjab, Ghudda, Bathinda, Punjab, India
| | - Pushpendu Kundu
- Department of Botany, Central University of Punjab, Ghudda, Bathinda, Punjab, India
| | - Felix Bast
- Department of Botany, Central University of Punjab, Ghudda, Bathinda, Punjab, India
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Klomjit A, Vieira C, Mattos FMG, Sutthacheep M, Sutti S, Kim MS, Yeemin T. Diversity and Ecology of Lobophora Species Associated with Coral Reef Systems in the Western Gulf of Thailand, including the Description of Two New Species. PLANTS (BASEL, SWITZERLAND) 2022; 11:3349. [PMID: 36501388 PMCID: PMC9739394 DOI: 10.3390/plants11233349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/19/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
The brown macroalgal genus Lobophora plays important ecological roles in many marine ecosystems. This group has received much attention over the past decade, and a considerable number of new species have been identified globally. However, our knowledge of the genus diversity and ecology along south-east Asian coasts are still limited. Given the growing body of research that uses a combination of molecular and morphological data to identify cryptic species, this study investigates the diversity of Lobophora in the western Gulf of Thailand using morphological and molecular data, as well as their interactions with scleractinian corals. A total of 36 Lobophora specimens were collected from 15 sites in the western Gulf of Thailand and used for molecular and morphological analyses. One mitochondrial (cox3) and two chloroplast (psbA and rbcL) genes were amplified and sequenced for molecular phylogenetic analyses. Based primarily on phylogenetic evidence, two new species were formally described, L. chumphonensis sp. nov. and L. thailandensis sp. nov. Additionally, L. lamourouxii was newly recorded from Thailand. Two new lineages of Lobophora obscura were identified, L. obscura12 and L. obscura13. Among the Lobophora species identified, three were found in interaction with corals, the most notable of which was the massive coral Porites. Lobophora chumphonensis sp. nov. only interacted with Porites by growing on bare coral skeleton between Porites colonies. Furthermore, L. obscura13 was observed under the branching coral Pocillopora. Our findings revealed that Lobophora presented both effects and absence of effects on coral. A thorough understanding of Lobophora diversity and ecology is essential for ongoing and future research on coral-macroalgal ecological relationships.
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Affiliation(s)
- Anirut Klomjit
- Marine Biodiversity Research Group, Department of Biology, Faculty of Science, Ramkhamheang University, Bangkok 10240, Thailand
| | - Christophe Vieira
- Research Institute of Basic Science, Jeju National University, Jeju 63243, Republic of Korea
| | - Felipe M. G. Mattos
- Marine Biodiversity Research Group, Department of Biology, Faculty of Science, Ramkhamheang University, Bangkok 10240, Thailand
- Taiwan International Graduate Program, Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Makamas Sutthacheep
- Marine Biodiversity Research Group, Department of Biology, Faculty of Science, Ramkhamheang University, Bangkok 10240, Thailand
| | - Suttikarn Sutti
- Thailand Natural History Museum, National Science Museum, Pathum Thani 12120, Thailand
| | - Myung-Sook Kim
- Research Institute of Basic Science, Jeju National University, Jeju 63243, Republic of Korea
| | - Thamasak Yeemin
- Marine Biodiversity Research Group, Department of Biology, Faculty of Science, Ramkhamheang University, Bangkok 10240, Thailand
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Removal of Toxic Heavy Metals from Contaminated Aqueous Solutions Using Seaweeds: A Review. SUSTAINABILITY 2021. [DOI: 10.3390/su132112311] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Heavy metal contamination affects lives with concomitant environmental pollution, and seaweed has emerged as a remedy with the ability to save the ecosystem, due to its eco-friendliness, affordability, availability, and effective metal ion removal rate. Heavy metals are intrinsic toxicants that are known to induce damage to multiple organs, especially when subjected to excess exposure. With respect to these growing concerns, this review presents the preferred sorption material among the many natural sorption materials. The use of seaweeds to treat contaminated solutions has demonstrated outstanding results when compared to other materials. The sorption of metal ions using dead seaweed biomass offers a comparative advantage over other natural sorption materials. This article summarizes the impact of heavy metals on the environment, and why dead seaweed biomass is regarded as the leading remediation material among the available materials. This article also showcases the biosorption mechanism of dead seaweed biomass and its effectiveness as a useful, cheap, and affordable bioremediation material.
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Grant WS, Chenoweth E. Phylogeography of sugar kelp: Northern ice-age refugia in the Gulf of Alaska. Ecol Evol 2021; 11:4670-4687. [PMID: 33976839 PMCID: PMC8093666 DOI: 10.1002/ece3.7368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 11/13/2022] Open
Abstract
Many Northeast (NE) Pacific fishes and invertebrates survived Pleistocene glaciations in northern refugia, but the extent that kelps survived in northern areas is uncertain. Here, we test the hypothesis that populations of sugar kelp (Saccharina latissima) persisted in the Gulf of Alaska during ice-age maxima when the western margin of the Cordilleran ice sheet covered coastal areas around the NE Pacific Ocean. We estimated genetic diversities within and phylogeographical relationships among 14 populations along 2,800 km in the NE Pacific and Bering Sea with partial sequences of mitochondrial DNA 5'-cytochrome oxidase subunit I (COI, bp = 624, n = 543), chloroplast DNA ribulose-1,5-bisphosphate carboxylase large subunit-3' (rbcL, bp = 735, n = 514), and 11 microsatellite loci. Concatenated sequences of rbcL and COI showed moderate levels of within-population genetic diversity (mean h = 0.200) but substantial differences among populations (ΦST = 0.834, p < .0001). Microsatellites showed moderate levels of heterozygosity within populations (mean H E = 0.391). Kelps in the same organellar lineage tended to cluster together, regardless of geographic origins, as indicated in a principal coordinate analysis (PCoA) of microsatellite genotypes. The PCoA also showed evidence of nuclear hybridizations between co-occurring organellar lineages. Individual admixture plots with population clusters of K = 2, 6, and 9 showed increasing complexity with considerable historical admixture between some clusters. A time-calibrated phylogeny placed divergences between rbcL-COI lineages at 1.4 million years at most. The time frames of mutation in the rbcL-COI lineages and microsatellite population clusters differed among locations. The existence of ancient lineages in the Gulf of Alaska, moderate levels of genetic diversity, and the absence of departures from neutrality are consistent with northern refugia during multiple Croll-Milankovitch climate cycles in the Pleistocene Epoch.
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Grant WS, Bringloe TT. Pleistocene Ice Ages Created New Evolutionary Lineages, but Limited Speciation in Northeast Pacific Winged Kelp. J Hered 2020; 111:593-605. [PMID: 33252684 DOI: 10.1093/jhered/esaa053] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Accepted: 11/27/2020] [Indexed: 11/13/2022] Open
Abstract
The extent that Pleistocene climate variability promoted speciation has been much debated. Here, we surveyed genetic markers in winged kelp Alaria in the Gulf of Alaska, Northeast Pacific Ocean to understand how paleoclimates may have influenced diversity in this kelp. The study included wide geographic sampling over 2800 km and large sample sizes compared to previous studies of this kelp. Mitochondrial 5'-COI (664 bp), plastid rbcL-3' (740 bp) and 8 microsatellite markers in 16 populations resolved 5 well-defined lineages. COI-rbcL haplotypes were distributed chaotically among populations around the Gulf of Alaska. Principal Coordinates Analysis of microsatellite genotypes grouped plants largely by organellar lineage instead of geography, indicating reproductive isolation among lineages. However, microsatellite markers detected hybrids at 3 sites where lineages co-occurred. Local adaptation on various time scales may be responsible for some genetic differences between populations located along wave-energy and salinity gradients, but the chaotic pattern of variability over hundreds of kilometers is likely due to isolations in northern refugia during Pleistocene ice ages. The range of divergences between populations indicates that episodic glaciations led to the creation of new lineages, but population turnover (local extinctions and recolonizations) limited the formation of new species in the Northeastern Pacific Ocean.
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Affiliation(s)
- W Stewart Grant
- Genetics Laboratory, Alaska Department of Fish & Game, Anchorage, AK
- College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Juneau, AK
| | - Trevor T Bringloe
- School of BioSciences, University of Melbourne, Parkville Campus, Victoria, Australia
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Phylogeography of split kelp Hedophyllum nigripes: northern ice-age refugia and trans-Arctic dispersal. Polar Biol 2020. [DOI: 10.1007/s00300-020-02748-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Camacho O, Fernández-García C, Vieira C, Gurgel CFD, Norris JN, Freshwater DW, Fredericq S. The systematics of Lobophora (Dictyotales, Phaeophyceae) in the western Atlantic and eastern Pacific oceans: eight new species. JOURNAL OF PHYCOLOGY 2019; 55:611-624. [PMID: 30805921 DOI: 10.1111/jpy.12850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 12/12/2018] [Indexed: 05/21/2023]
Abstract
Lobophora is a common tropical to temperate genus of brown algae found in a plethora of habitats including shallow and deep-water coral reefs, rocky shores, mangroves, seagrass beds, and rhodoliths beds. Recent molecular studies have revealed that Lobophora species diversity has been severely underestimated. Current estimates of the species numbers range from 100 to 140 species with a suggested center of diversity in the Central Indo-Pacific. This study used three molecular markers (cox3, rbcL, psbA), different single-marker species delimitation methods (GMYC, ABGD, PTP), and morphological evidence to evaluate Lobophora species diversity in the Western Atlantic and the Eastern Pacific oceans. Cox3 provided the greatest number of primary species hypotheses(PSH), followed by rbcL and then psbA. GMYC species delimitation analysis was the most conservative across all three markers, followed by PTP, and then ABGD. The most informative diagnostic morphological characters were thallus thickness and number of cell layers in both the medulla and the dorsal/ventral cortices. Following a consensus approach, 14 distinct Lobophora species were identified in the Western Atlantic and five in the Eastern Pacific. Eight new species from these two oceans were herein described: L. adpressa sp. nov., L. cocoensis sp. nov., L. colombiana sp. nov., L. crispata sp. nov., L. delicata sp. nov., L. dispersa sp. nov., L. panamensis sp. nov., and L. tortugensis sp. nov. This study showed that the best approach to confidently identify Lobophora species is to analyze DNA sequences (preferably cox3 and rbcL) followed by comparative morphological and geographical assessment.
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Affiliation(s)
- Olga Camacho
- Department of Biology, University of Louisiana at Lafayette, Lafayette, Louisiana, 70504-3602, USA
- Programa de Pós-Graduação em Biologia de Fungos, Algas e Plantas, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, 88040-900, Brazil
| | - Cindy Fernández-García
- Centro de Investigación en Ciencias del Mar y Limnología (CIMAR), Escuela de Biología, Universidad de Costa Rica, San Pedro, San José, 11501-2060, Costa Rica
| | - Christophe Vieira
- Phycology Research Group and Center for Molecular Phylogenetics and Evolution, Ghent University, Krijgslaan 281 (S8), B-9000, Ghent, Belgium
| | - Carlos Frederico D Gurgel
- Programa de Pós-Graduação em Biologia de Fungos, Algas e Plantas, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, 88040-900, Brazil
| | - James N Norris
- Department of Botany, NHB166, National Museum of Natural History, Smithsonian Institution, Washington, District of Columbia, 20013-7012, USA
| | - David Wilson Freshwater
- Center for Marine Science, University of North Carolina at Wilmington, Wilmington, North Carolina, 28403, USA
| | - Suzanne Fredericq
- Department of Biology, University of Louisiana at Lafayette, Lafayette, Louisiana, 70504-3602, USA
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Zatelli GA, Philippus AC, Falkenberg M. An overview of odoriferous marine seaweeds of the Dictyopteris genus: insights into their chemical diversity, biological potential and ecological roles. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2018. [DOI: 10.1016/j.bjp.2018.01.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Salem AB, Di Giuseppe G, Anesi A, Hammami S, Mighri Z, Guella G. Natural Products among Brown Algae: The Case of Cystoseira schiffneri Hamel (Sargassaceae, Phaeophyceae). Chem Biodivers 2017; 14. [PMID: 27981801 DOI: 10.1002/cbdv.201600333] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 12/14/2016] [Indexed: 11/08/2022]
Abstract
A chemotaxonomic study on the marine brown alga Cystoseira schiffneri collected from the Tunisian marine coast allowed us to identify kjellmanianone (1) and a new isololiolide derivative named schiffnerilolide (2). The structure elucidation and the assignment of relative configurations of the isolated natural products were based on advanced mass spectrometric and nuclear magnetic resonance techniques. This outcome suggested a close phylogenetic relationship of C. schiffneri with brown algae belonging to genus Sargassum C. Agardh. Molecular characterization using the nuclear small subunit rRNA (SSU rRNA) gene (18S) sequence as genetic marker was made. Pigment analysis showed a significant seasonal change of carotenoids, in particular of fucoxanthin and fucoxanthinol. Also galactolipids, the main constituents of the thylakoid membranes, showed remarkable seasonal changes.
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Affiliation(s)
- Abdelkader Ben Salem
- Research Unit of Applied Chemistry and Environment (UR13ES63), Faculty of Sciences of Monastir, Avenue of the Environment, 5000 Monastir, University of Monastir, Tunisia
- Laboratory of Bioorganic Chemistry, Department of Physics, University of Trento, 38123, Povo, Trento, Italy
| | - Graziano Di Giuseppe
- Unit of Zoology-Anthropology, Department of Biology, University of Pisa, 56126, Pisa, Italy
| | - Andrea Anesi
- Laboratory of Bioorganic Chemistry, Department of Physics, University of Trento, 38123, Povo, Trento, Italy
| | - Saoussen Hammami
- Research Unit of Applied Chemistry and Environment (UR13ES63), Faculty of Sciences of Monastir, Avenue of the Environment, 5000 Monastir, University of Monastir, Tunisia
| | - Zine Mighri
- Research Unit of Applied Chemistry and Environment (UR13ES63), Faculty of Sciences of Monastir, Avenue of the Environment, 5000 Monastir, University of Monastir, Tunisia
| | - Graziano Guella
- Laboratory of Bioorganic Chemistry, Department of Physics, University of Trento, 38123, Povo, Trento, Italy
- Biophysical Institute, CNR, 38123, Povo, Trento, Italy
- Centre for Agriculture, Food and Environment, University of Trento, via Mach 1, 38010, San Michele all Adige, Trento, Italy
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Küpper FC, Peters AF, Shewring DM, Sayer MDJ, Mystikou A, Brown H, Azzopardi E, Dargent O, Strittmatter M, Brennan D, Asensi AO, van West P, Wilce RT. Arctic marine phytobenthos of northern Baffin Island. JOURNAL OF PHYCOLOGY 2016; 52:532-49. [PMID: 27037790 PMCID: PMC5113804 DOI: 10.1111/jpy.12417] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 02/19/2016] [Indexed: 05/22/2023]
Abstract
Global climate change is expected to alter the polar bioregions faster than any other marine environment. This study assesses the biodiversity of seaweeds and associated eukaryotic pathogens of an established study site in northern Baffin Island (72° N), providing a baseline inventory for future work assessing impacts of the currently ongoing changes in the Arctic marine environment. A total of 33 Phaeophyceae, 24 Rhodophyceae, 2 Chlorophyceae, 12 Ulvophyceae, 1 Trebouxiophyceae, and 1 Dinophyceae are reported, based on collections of an expedition to the area in 2009, complemented by unpublished records of Robert T. Wilce and the first-ever photographic documentation of the phytobenthos of the American Arctic. Molecular barcoding of isolates raised from incubated substratum samples revealed the presence of 20 species of brown seaweeds, including gametophytes of kelp and of a previously unsequenced Desmarestia closely related to D. viridis, two species of Pylaiella, the kelp endophyte Laminariocolax aecidioides and 11 previously unsequenced species of the Ectocarpales, highlighting the necessity to include molecular techniques for fully unraveling cryptic algal diversity. This study also includes the first records of Eurychasma dicksonii, a eukaryotic pathogen affecting seaweeds, from the American Arctic. Overall, this study provides both the most accurate inventory of seaweed diversity of the northern Baffin Island region to date and can be used as an important basis to understand diversity changes with climate change.
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Affiliation(s)
- Frithjof C Küpper
- Scottish Association for Marine Science, Dunbeg, Oban, Argyll, PA37 1QA, UK
- Oceanlab, University of Aberdeen, Main Street, Newburgh, AB41 6AA, UK
| | - Akira F Peters
- BEZHIN ROSKO, 40 rue des pêcheurs, 29250, Santec, France
| | - Dawn M Shewring
- Oceanlab, University of Aberdeen, Main Street, Newburgh, AB41 6AA, UK
| | - Martin D J Sayer
- UK National Facility for Scientific Diving, Scottish Association for Marine Science, Dunbeg, Oban, Argyll, PA37 1QA, UK
| | | | - Hugh Brown
- UK National Facility for Scientific Diving, Scottish Association for Marine Science, Dunbeg, Oban, Argyll, PA37 1QA, UK
| | - Elaine Azzopardi
- UK National Facility for Scientific Diving, Scottish Association for Marine Science, Dunbeg, Oban, Argyll, PA37 1QA, UK
| | - Olivier Dargent
- Centre International de Valbonne, 190 rue Frédéric Mistral, 06560, Valbonne, France
| | | | - Debra Brennan
- Scottish Association for Marine Science, Dunbeg, Oban, Argyll, PA37 1QA, UK
| | | | - Pieter van West
- Institute of Medical Sciences, College of Life Sciences and Medicine, Aberdeen Oomycete Laboratory, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK
| | - Robert T Wilce
- Department of Biology, University of Massachusetts, Amherst, Massachusetts, 01003, USA
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Vieira C, D'hondt S, De Clerck O, Payri CE. Toward an inordinate fondness for stars, beetles and Lobophora? Species diversity of the genus Lobophora (Dictyotales, Phaeophyceae) in New Caledonia. JOURNAL OF PHYCOLOGY 2014; 50:1101-1119. [PMID: 26988791 DOI: 10.1111/jpy.12243] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 07/27/2014] [Indexed: 06/05/2023]
Abstract
Until the recent use of molecular markers, species diversity of Lobophora, an ecologically important brown algal genus with a worldwide distribution in temperate and tropical seas, has been critically underestimated. Using a DNA-based taxonomic approach, we re-examined diversity of the genus from New Caledonia in the Southwest Pacific Ocean. First, species were delineated using general mixed Yule coalescent-based and barcoding gap approaches applied to a mitochondrial cox3 data set. Results were subsequently confirmed using chloroplast psbA and rbcL data sets. Species delimitation analyses agreed well across markers and delimitation algorithms, with the barcoding gap approach being slightly more conservative. Analyses of the cox3 data set resulted in 31-39 molecular operational taxonomic units (MOTUs), four of which are previously described species (L. asiatica, L. crassa, L. nigrescens s.l., L. pachyventera). Of the remaining MOTUs for which we obtained a representative number of sequences and results are corroborated across analyses and genes, we described 10 species de novo: L. abaculusa, L. abscondita, L. densa, L. dimorpha, L. gibbera, L. hederacea, L. monticola, L. petila, L. rosacea, and L. undulata. Our study presents an excellent case of how a traditional morphology-based taxonomy fails to provide accurate estimates of algal diversity. Furthermore, the level of Lobophora diversity unveiled from a single locality in the Pacific Ocean raises important questions with respect to the global diversity of the genus, the distributions and range sizes of the individual species, as well as the mechanisms facilitating coexistence.
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Affiliation(s)
- Christophe Vieira
- CoRéUs, LabEx-CORAIL, U227 "Biocomplexité des écosystèmes coralliens", Institut de Recherche pour le Développement, B.P. A5, 98848 Nouméa Cedex, Nouvelle-Calédonie, France
- Sorbonne Universités, UPMC Univ Paris 06, IFD, 4 Place Jussieu, 75252, Paris Cedex 05, France
- Phycology Research Group and Center for Molecular Phylogenetics and Evolution, Ghent University, Krijgslaan 281 (S8), Ghent, B-9000, Belgium
| | - Sofie D'hondt
- Phycology Research Group and Center for Molecular Phylogenetics and Evolution, Ghent University, Krijgslaan 281 (S8), Ghent, B-9000, Belgium
| | - Olivier De Clerck
- Phycology Research Group and Center for Molecular Phylogenetics and Evolution, Ghent University, Krijgslaan 281 (S8), Ghent, B-9000, Belgium
| | - Claude E Payri
- CoRéUs, LabEx-CORAIL, U227 "Biocomplexité des écosystèmes coralliens", Institut de Recherche pour le Développement, B.P. A5, 98848 Nouméa Cedex, Nouvelle-Calédonie, France
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14
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Fraser CI, Waters JM. Algal Parasite Herpodiscus durvillaeae (Phaeophyceae: Sphacelariales) Inferred to have Traversed the Pacific Ocean with its Buoyant Host. JOURNAL OF PHYCOLOGY 2013; 49:202-206. [PMID: 27008401 DOI: 10.1111/jpy.12017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Accepted: 09/13/2012] [Indexed: 06/05/2023]
Abstract
The parasitic phaeophycean endophyte Herpodiscus durvillaeae (Lindauer) G. R. South has previously only been recorded from New Zealand, in association with a single host species, Durvillaea antarctica (Chamisso) Hariot (southern bull-kelp). Here we use DNA sequence data from plastid and nuclear markers (chloroplast rbcL, ribosomal LSU, and a nuclear pseudogene copy of COI) to test for the presence of H. durvillaeae beyond the New Zealand region, and on host species other than D. antarctica. Analyses of samples from the Falkland Islands confirm the first record of H. durvillaeae from the Atlantic Ocean. We report that Falkland Islands H. durvillaeae are genetically indistinguishable from samples of this species from New Zealand's sub-Antarctic Campbell Island, suggesting recent dispersal of the parasite across the Pacific Ocean, presumably by rafting with its buoyant macroalgal host. We also here record H. durvillaeae from New Zealand endemics Durvillaea poha Fraser et al. and D. willana Lindauer.
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Affiliation(s)
- Ceridwen I Fraser
- Allan Wilson Centre for Molecular Ecology and Evolution, Department of Zoology, University of Otago, 340 Great King St, Dunedin, 9016, New Zealand
| | - Jonathan M Waters
- Allan Wilson Centre for Molecular Ecology and Evolution, Department of Zoology, University of Otago, 340 Great King St, Dunedin, 9016, New Zealand
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15
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Silberfeld T, Bittner L, Fernández-García C, Cruaud C, Rousseau F, de Reviers B, Leliaert F, Payri CE, De Clerck O. Species Diversity, Phylogeny and Large Scale Biogeographic Patterns of the Genus Padina (Phaeophyceae, Dictyotales). JOURNAL OF PHYCOLOGY 2013; 49:130-142. [PMID: 27008395 DOI: 10.1111/jpy.12027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Accepted: 07/10/2012] [Indexed: 06/05/2023]
Abstract
The brown algal genus Padina (Dictyotales, Phaeophyceae) is distributed worldwide in tropical and temperate seas. Global species diversity and distribution ranges, however, remain largely unknown. Species-level diversity was reassessed using DNA-based, algorithmic species delineation techniques based on cox3 and rbcL sequence data from 221 specimens collected worldwide. This resulted in estimates ranging from 39 to 61 putative species (ESUs), depending on the technique as well as the locus. We discuss the merits, potential pitfalls, and evolutionary and biogeographic significance of algorithmic species delineation. We unveil patterns whereby ESUs are in all but one case restricted to either the Atlantic or Indo-Pacific Ocean. Within ocean basins we find evidence for the vast majority of ESUs to be confined to a single marine realm. Exceptions, whereby ESUs span up to three realms, are located in the Indo-Pacific Ocean. Patterns of range-restricted species likely arise by repeated founder events and subsequent peripatric speciation, hypothesized to dominate speciation mechanisms for coastal marine organisms in the Indo-Pacific. Using a three-gene (cox3, psaA and rbcL), relaxed molecular clock phylogenetic analysis we estimated divergence times, providing a historical framework to interpret biogeographic patterns.
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Affiliation(s)
- Thomas Silberfeld
- UMR 7138, UPMC, MNHN, CNRS, IRD: Systématique, adaptation, évolution, Département Systématique & évolution, Muséum National d'Histoire Naturelle, 57 rue Cuvier, CP 39, 75231, Paris Cedex 05, France
| | - Lucie Bittner
- UMR 7138, UPMC, MNHN, CNRS, IRD: Systématique, adaptation, évolution, Département Systématique & évolution, Muséum National d'Histoire Naturelle, 57 rue Cuvier, CP 39, 75231, Paris Cedex 05, France
| | - Cindy Fernández-García
- Programa en Botánica Marina, Posgrado en Ciencias Marinas y Costeras, UABCS, La Paz, México
- Centro de Investigación en Ciencias del Mar y Limnología (CIMAR), Escuela de Biología, Universidad de Costa Rica, San Pedro, San José, 2060, Costa Rica
| | - Corinne Cruaud
- Genoscope, Centre national de séquençage, 2 rue Gaston Crémieux, CP 5706, 91057, Évry Cedex, France
| | - Florence Rousseau
- UMR 7138, UPMC, MNHN, CNRS, IRD: Systématique, adaptation, évolution, Département Systématique & évolution, Muséum National d'Histoire Naturelle, 57 rue Cuvier, CP 39, 75231, Paris Cedex 05, France
| | - Bruno de Reviers
- UMR 7138, UPMC, MNHN, CNRS, IRD: Systématique, adaptation, évolution, Département Systématique & évolution, Muséum National d'Histoire Naturelle, 57 rue Cuvier, CP 39, 75231, Paris Cedex 05, France
| | - Frederik Leliaert
- Phycology Research Group, Ghent University, Krijgslaan 281, Building S8, 9000, Ghent, Belgium
| | - Claude E Payri
- U227, Biocomplexité des écosystèmes coralliens de l'Indo-Pacifique, Institut de Recherche pour le Développement, BP A5, 98848, Nouméa Cedex, New Caledonia
| | - Olivier De Clerck
- Phycology Research Group, Ghent University, Krijgslaan 281, Building S8, 9000, Ghent, Belgium
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16
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Adl SM, Simpson AGB, Lane CE, Lukeš J, Bass D, Bowser SS, Brown MW, Burki F, Dunthorn M, Hampl V, Heiss A, Hoppenrath M, Lara E, Le Gall L, Lynn DH, McManus H, Mitchell EAD, Mozley-Stanridge SE, Parfrey LW, Pawlowski J, Rueckert S, Shadwick L, Shadwick L, Schoch CL, Smirnov A, Spiegel FW. The revised classification of eukaryotes. J Eukaryot Microbiol 2013; 59:429-93. [PMID: 23020233 DOI: 10.1111/j.1550-7408.2012.00644.x] [Citation(s) in RCA: 901] [Impact Index Per Article: 81.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
This revision of the classification of eukaryotes, which updates that of Adl et al. [J. Eukaryot. Microbiol. 52 (2005) 399], retains an emphasis on the protists and incorporates changes since 2005 that have resolved nodes and branches in phylogenetic trees. Whereas the previous revision was successful in re-introducing name stability to the classification, this revision provides a classification for lineages that were then still unresolved. The supergroups have withstood phylogenetic hypothesis testing with some modifications, but despite some progress, problematic nodes at the base of the eukaryotic tree still remain to be statistically resolved. Looking forward, subsequent transformations to our understanding of the diversity of life will be from the discovery of novel lineages in previously under-sampled areas and from environmental genomic information.
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Affiliation(s)
- Sina M Adl
- Department of Soil Science, University of Saskatchewan, Saskatoon, SK, S7N 5A8, Canada.
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17
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Abstract
Brown algae are an extremely interesting, but surprisingly poorly explored, group of organisms. They are one of only five eukaryotic lineages to have independently evolved complex multicellularity, which they express through a wide variety of morphologies ranging from uniseriate branched filaments to complex parenchymatous thalli with multiple cell types. Despite their very distinct evolutionary history, brown algae and land plants share a striking amount of developmental features. This has led to an interest in several aspects of brown algal development, including embryogenesis, polarity, cell cycle, asymmetric cell division and a putative role for plant hormone signalling. This review describes how investigations using brown algal models have helped to increase our understanding of the processes controlling early embryo development, in particular polarization, axis formation and asymmetric cell division. Additionally, the diversity of life cycles in the brown lineage and the emergence of Ectocarpus as a powerful model organism, are affording interesting insights on the molecular mechanisms underlying haploid-diploid life cycles. The use of these and other emerging brown algal models will undoubtedly add to our knowledge on the mechanisms that regulate development in multicellular photosynthetic organisms.
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Affiliation(s)
- Kenny A Bogaert
- Phycology Research Group, Department of Biology, Center for Molecular Phylogenetics and Evolution, Ghent University, Ghent, Belgium
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18
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Win NN, Hanyuda T, Arai S, Uchimura M, Prathep A, Draisma SGA, Phang SM, Abbott IA, Millar AJK, Kawai H. A TAXONOMIC STUDY OF THE GENUS PADINA (DICTYOTALES, PHAEOPHYCEAE) INCLUDING THE DESCRIPTIONS OF FOUR NEW SPECIES FROM JAPAN, HAWAII, AND THE ANDAMAN SEA(1). JOURNAL OF PHYCOLOGY 2011; 47:1193-1209. [PMID: 27028247 DOI: 10.1111/j.1529-8817.2011.01054.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A taxonomic study of the genus Padina from Japan, Southeast Asia, and Hawaii based on morphology and gene sequence data (rbcL and cox3) resulted in the recognition of four new species, that is, Padina macrophylla and Padina ishigakiensis from Ryukyu Islands, Japan; Padina maroensis from Hawaii; and Padina usoehtunii from Myanmar and Thailand. All species are bistratose and morphologically different from one another as well as from any known taxa by a combination of characters relating to degree of calcification; the structure, position, and arrangement of hairlines (HLs) and reproductive sori; and the presence or absence of rhizoid-like groups of hairs and an indusium. Molecular phylogenetic analyses demonstrated a close relationship between P. ishigakiensis, P. macrophylla, P. maroensis, and Padina australis Hauck. The position of P. usoehtunii, however, was not fully resolved, being either sister to a clade comprising the other three new species and P. australis in the rbcL tree or more closely related to a clade comprising several other recently described species in the cox3 tree. The finding of the four new species demonstrates high species diversity particularly in southern Japan. The following characters were first recognized here to be useful for species delimitation: the presence or absence of small rhizoid-like groups of hairs on the thallus surface, structure and arrangement of HLs on both surfaces either alternate or irregular, and arrangement of the alternating HLs between both surfaces in equal or unequal distance. The evolutionary trajectory of these and six other morphological characters used in species delineation was traced on the phylogenetic tree.
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Affiliation(s)
- Ni Ni Win
- Graduate School of Science and Technology, Kobe University, Rokkodai, Kobe 657-8501, JapanKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, JapanMarine Algal Research Co., Ltd., Minatozaka 3-9-4, Shingu, Kasuya, Fukuoka 811-0114, JapanPort and Airport Research Institute, Nagase, Yokosuka, 239-0826 Kanagawa, JapanSeaweed and Seagrass Research Unit, Centre for Biodiversity of Peninsular Thailand (CBIPT), Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla 90112, ThailandInstitute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Botany, University of Hawaii, Maile Way, Hawaii 96822, USARoyal Botanic Gardens Sydney, Mrs Macquaries Rd, Sydney, New South Wales 2000, AustraliaKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan
| | - Takeaki Hanyuda
- Graduate School of Science and Technology, Kobe University, Rokkodai, Kobe 657-8501, JapanKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, JapanMarine Algal Research Co., Ltd., Minatozaka 3-9-4, Shingu, Kasuya, Fukuoka 811-0114, JapanPort and Airport Research Institute, Nagase, Yokosuka, 239-0826 Kanagawa, JapanSeaweed and Seagrass Research Unit, Centre for Biodiversity of Peninsular Thailand (CBIPT), Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla 90112, ThailandInstitute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Botany, University of Hawaii, Maile Way, Hawaii 96822, USARoyal Botanic Gardens Sydney, Mrs Macquaries Rd, Sydney, New South Wales 2000, AustraliaKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan
| | - Shogo Arai
- Graduate School of Science and Technology, Kobe University, Rokkodai, Kobe 657-8501, JapanKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, JapanMarine Algal Research Co., Ltd., Minatozaka 3-9-4, Shingu, Kasuya, Fukuoka 811-0114, JapanPort and Airport Research Institute, Nagase, Yokosuka, 239-0826 Kanagawa, JapanSeaweed and Seagrass Research Unit, Centre for Biodiversity of Peninsular Thailand (CBIPT), Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla 90112, ThailandInstitute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Botany, University of Hawaii, Maile Way, Hawaii 96822, USARoyal Botanic Gardens Sydney, Mrs Macquaries Rd, Sydney, New South Wales 2000, AustraliaKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan
| | - Masayuki Uchimura
- Graduate School of Science and Technology, Kobe University, Rokkodai, Kobe 657-8501, JapanKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, JapanMarine Algal Research Co., Ltd., Minatozaka 3-9-4, Shingu, Kasuya, Fukuoka 811-0114, JapanPort and Airport Research Institute, Nagase, Yokosuka, 239-0826 Kanagawa, JapanSeaweed and Seagrass Research Unit, Centre for Biodiversity of Peninsular Thailand (CBIPT), Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla 90112, ThailandInstitute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Botany, University of Hawaii, Maile Way, Hawaii 96822, USARoyal Botanic Gardens Sydney, Mrs Macquaries Rd, Sydney, New South Wales 2000, AustraliaKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan
| | - Anchana Prathep
- Graduate School of Science and Technology, Kobe University, Rokkodai, Kobe 657-8501, JapanKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, JapanMarine Algal Research Co., Ltd., Minatozaka 3-9-4, Shingu, Kasuya, Fukuoka 811-0114, JapanPort and Airport Research Institute, Nagase, Yokosuka, 239-0826 Kanagawa, JapanSeaweed and Seagrass Research Unit, Centre for Biodiversity of Peninsular Thailand (CBIPT), Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla 90112, ThailandInstitute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Botany, University of Hawaii, Maile Way, Hawaii 96822, USARoyal Botanic Gardens Sydney, Mrs Macquaries Rd, Sydney, New South Wales 2000, AustraliaKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan
| | - Stefano G A Draisma
- Graduate School of Science and Technology, Kobe University, Rokkodai, Kobe 657-8501, JapanKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, JapanMarine Algal Research Co., Ltd., Minatozaka 3-9-4, Shingu, Kasuya, Fukuoka 811-0114, JapanPort and Airport Research Institute, Nagase, Yokosuka, 239-0826 Kanagawa, JapanSeaweed and Seagrass Research Unit, Centre for Biodiversity of Peninsular Thailand (CBIPT), Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla 90112, ThailandInstitute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Botany, University of Hawaii, Maile Way, Hawaii 96822, USARoyal Botanic Gardens Sydney, Mrs Macquaries Rd, Sydney, New South Wales 2000, AustraliaKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan
| | - Siew Moi Phang
- Graduate School of Science and Technology, Kobe University, Rokkodai, Kobe 657-8501, JapanKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, JapanMarine Algal Research Co., Ltd., Minatozaka 3-9-4, Shingu, Kasuya, Fukuoka 811-0114, JapanPort and Airport Research Institute, Nagase, Yokosuka, 239-0826 Kanagawa, JapanSeaweed and Seagrass Research Unit, Centre for Biodiversity of Peninsular Thailand (CBIPT), Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla 90112, ThailandInstitute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Botany, University of Hawaii, Maile Way, Hawaii 96822, USARoyal Botanic Gardens Sydney, Mrs Macquaries Rd, Sydney, New South Wales 2000, AustraliaKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan
| | - Isabella A Abbott
- Graduate School of Science and Technology, Kobe University, Rokkodai, Kobe 657-8501, JapanKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, JapanMarine Algal Research Co., Ltd., Minatozaka 3-9-4, Shingu, Kasuya, Fukuoka 811-0114, JapanPort and Airport Research Institute, Nagase, Yokosuka, 239-0826 Kanagawa, JapanSeaweed and Seagrass Research Unit, Centre for Biodiversity of Peninsular Thailand (CBIPT), Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla 90112, ThailandInstitute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Botany, University of Hawaii, Maile Way, Hawaii 96822, USARoyal Botanic Gardens Sydney, Mrs Macquaries Rd, Sydney, New South Wales 2000, AustraliaKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan
| | - Alan J K Millar
- Graduate School of Science and Technology, Kobe University, Rokkodai, Kobe 657-8501, JapanKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, JapanMarine Algal Research Co., Ltd., Minatozaka 3-9-4, Shingu, Kasuya, Fukuoka 811-0114, JapanPort and Airport Research Institute, Nagase, Yokosuka, 239-0826 Kanagawa, JapanSeaweed and Seagrass Research Unit, Centre for Biodiversity of Peninsular Thailand (CBIPT), Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla 90112, ThailandInstitute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Botany, University of Hawaii, Maile Way, Hawaii 96822, USARoyal Botanic Gardens Sydney, Mrs Macquaries Rd, Sydney, New South Wales 2000, AustraliaKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan
| | - Hiroshi Kawai
- Graduate School of Science and Technology, Kobe University, Rokkodai, Kobe 657-8501, JapanKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, JapanMarine Algal Research Co., Ltd., Minatozaka 3-9-4, Shingu, Kasuya, Fukuoka 811-0114, JapanPort and Airport Research Institute, Nagase, Yokosuka, 239-0826 Kanagawa, JapanSeaweed and Seagrass Research Unit, Centre for Biodiversity of Peninsular Thailand (CBIPT), Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla 90112, ThailandInstitute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Botany, University of Hawaii, Maile Way, Hawaii 96822, USARoyal Botanic Gardens Sydney, Mrs Macquaries Rd, Sydney, New South Wales 2000, AustraliaKobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan
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19
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Silberfeld T, Leigh JW, Verbruggen H, Cruaud C, de Reviers B, Rousseau F. A multi-locus time-calibrated phylogeny of the brown algae (Heterokonta, Ochrophyta, Phaeophyceae): Investigating the evolutionary nature of the "brown algal crown radiation". Mol Phylogenet Evol 2010; 56:659-74. [PMID: 20412862 DOI: 10.1016/j.ympev.2010.04.020] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2009] [Revised: 04/09/2010] [Accepted: 04/13/2010] [Indexed: 11/27/2022]
Abstract
The most conspicuous feature in previous phaeophycean phylogenies is a large polytomy known as the brown algal crown radiation (BACR). The BACR encompasses 10 out of the 17 currently recognized brown algal orders. A recent study has been able to resolve a few nodes of the BACR, suggesting that it may be a soft polytomy caused by a lack of signal in molecular markers. The present work aims to refine relationships within the BACR and investigate the nature and timeframe of the diversification in question using a dual approach. A multi-marker phylogeny of the brown algae was built from 10 mitochondrial, plastid and nuclear loci (>10,000 nt) of 72 phaeophycean taxa, resulting in trees with well-resolved inter-ordinal relationships within the BACR. Using Bayesian relaxed molecular clock analysis, it is shown that the BACR is likely to represent a gradual diversification spanning most of the Lower Cretaceous rather than a sudden radiation. Non-molecular characters classically used in ordinal delimitation were mapped on the molecular topology to study their evolutionary history.
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Affiliation(s)
- Thomas Silberfeld
- UMR 7138, UPMC, MNHN, CNRS, IRD: Systématique, adaptation, évolution, Département Systématique & évolution, USM 603, Muséum National d'Histoire Naturelle, 75231 Paris cedex 05, France.
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20
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Lee KM, Boo GH, Riosmena-Rodriguez R, Shin JA, Boo SM. CLASSIFICATION OF THE GENUS ISHIGE (ISHIGEALES, PHAEOPHYCEAE) IN THE NORTH PACIFIC OCEAN WITH RECOGNITION OF ISHIGE FOLIACEA BASED ON PLASTID rbcl AND MITOCHONDRIAL cox3 GENE SEQUENCES(1). JOURNAL OF PHYCOLOGY 2009; 45:906-913. [PMID: 27034221 DOI: 10.1111/j.1529-8817.2009.00704.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The taxonomy and biogeography of a genus with species that occur in geographically isolated regions is interesting. The brown algal genus Ishige Yendo is a good example, with species that apparently inhabit warm regions of both the northwestern and northeastern Pacific Ocean. We determined the sequences of mitochondrial cox3 and plastid rbcL genes from specimens of the genus collected over its distributional range. Analyses of the 86 cox3 and 97 rbcL sequences resulted in congruent trees in which Ishige sinicola (Setch. et N. L. Gardner) Chihara consisted of two distinct clades: one comprising samples from Korea and Japan, and the other comprising samples from the Gulf of California. Additional observations of the morphology and anatomy of the specimens agree with the molecular data. On the basis of results, we reinstated Ishige foliacea S. Okamura (considered a synonym of I. sinicola from the Gulf of California) for plants from the northwest Pacific region and designated a specimen in the Yendo Herbarium (SAP) as the lectotype. I. foliacea is distinguished by large (up to 20 cm) and wide (up to 20 mm) thalli, with a cortex of 4-7 cells, and a medulla composed of long, tangled hyphal cells. Both cox3 and rbcL sequence data strongly support the sister-area relationship between the northwest Pacific region and the Gulf of California. A likely explanation for this pattern would be the presence of a species ancestral to contemporary species of Ishige in both regions during the paleogeological period, with descendants later isolated by distance.
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Affiliation(s)
- Kyung Min Lee
- Department of Biology, Chungnam National University, Daejon 305-764, KoreaPrograma de Investigación en Botánica Marina, Departamento de Biología Marina, Universidad Autónoma de Baja California Sur, Apartado postal 19-B, La Paz B.C.S. 23080, MexicoDepartment of Aquaculture, Cheonnam National University, Yeosu 550-749, KoreaDepartment of Biology, Chungnam National University, Daejon 305-764, Korea
| | - Ga Hun Boo
- Department of Biology, Chungnam National University, Daejon 305-764, KoreaPrograma de Investigación en Botánica Marina, Departamento de Biología Marina, Universidad Autónoma de Baja California Sur, Apartado postal 19-B, La Paz B.C.S. 23080, MexicoDepartment of Aquaculture, Cheonnam National University, Yeosu 550-749, KoreaDepartment of Biology, Chungnam National University, Daejon 305-764, Korea
| | - Rafael Riosmena-Rodriguez
- Department of Biology, Chungnam National University, Daejon 305-764, KoreaPrograma de Investigación en Botánica Marina, Departamento de Biología Marina, Universidad Autónoma de Baja California Sur, Apartado postal 19-B, La Paz B.C.S. 23080, MexicoDepartment of Aquaculture, Cheonnam National University, Yeosu 550-749, KoreaDepartment of Biology, Chungnam National University, Daejon 305-764, Korea
| | - Jong-Ahm Shin
- Department of Biology, Chungnam National University, Daejon 305-764, KoreaPrograma de Investigación en Botánica Marina, Departamento de Biología Marina, Universidad Autónoma de Baja California Sur, Apartado postal 19-B, La Paz B.C.S. 23080, MexicoDepartment of Aquaculture, Cheonnam National University, Yeosu 550-749, KoreaDepartment of Biology, Chungnam National University, Daejon 305-764, Korea
| | - Sung Min Boo
- Department of Biology, Chungnam National University, Daejon 305-764, KoreaPrograma de Investigación en Botánica Marina, Departamento de Biología Marina, Universidad Autónoma de Baja California Sur, Apartado postal 19-B, La Paz B.C.S. 23080, MexicoDepartment of Aquaculture, Cheonnam National University, Yeosu 550-749, KoreaDepartment of Biology, Chungnam National University, Daejon 305-764, Korea
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